diff options
Diffstat (limited to 'src/libstrongswan/fips/fips_canister_start.c')
| -rw-r--r-- | src/libstrongswan/fips/fips_canister_start.c | 174 |
1 files changed, 174 insertions, 0 deletions
diff --git a/src/libstrongswan/fips/fips_canister_start.c b/src/libstrongswan/fips/fips_canister_start.c new file mode 100644 index 000000000..eaf2571f8 --- /dev/null +++ b/src/libstrongswan/fips/fips_canister_start.c @@ -0,0 +1,174 @@ +/** + * @file fips_canister_start.c + * + * @brief Marks the start of TEXT and RODATA. + * + */ + +/* ==================================================================== + * Copyright (c) 2005 The OpenSSL Project. Rights for redistribution + * and usage in source and binary forms are granted according to the + * OpenSSL license. + */ + +#include <stdio.h> +#if defined(__DECC) +# include <c_asm.h> +# pragma __nostandard +#endif + +#if !defined(POINTER_TO_FUNCTION_IS_POINTER_TO_1ST_INSTRUCTION) +# if (defined(__sun) && (defined(__sparc) || defined(__sparcv9))) || \ + (defined(__sgi) && (defined(__mips) || defined(mips))) || \ + (defined(__osf__) && defined(__alpha)) || \ + (defined(__linux) && (defined(__arm) || defined(__arm__))) || \ + (defined(__i386) || defined(__i386__)) || \ + (defined(__x86_64) || defined(__x86_64__)) || \ + (defined(vax) || defined(__vax__)) +# define POINTER_TO_FUNCTION_IS_POINTER_TO_1ST_INSTRUCTION +# endif +#endif + + +#define FIPS_ref_point FIPS_text_start +/* Some compilers put string literals into a separate segment. As we + * are mostly interested to hash AES tables in .rodata, we declare + * reference points accordingly. In case you wonder, the values are + * big-endian encoded variable names, just to prevent these arrays + * from being merged by linker. */ +const unsigned int FIPS_rodata_start[]= + { 0x46495053, 0x5f726f64, 0x6174615f, 0x73746172 }; + + +/* + * I declare reference function as static in order to avoid certain + * pitfalls in -dynamic linker behaviour... + */ +static void *instruction_pointer(void) +{ + void *ret = NULL; + +/* These are ABI-neutral CPU-specific snippets. ABI-neutrality means + * that they are designed to work under any OS running on particular + * CPU, which is why you don't find any #ifdef THIS_OR_THAT_OS in + * this function. */ +#if defined(INSTRUCTION_POINTER_IMPLEMENTED) + INSTRUCTION_POINTER_IMPLEMENTED(ret); +#elif defined(__GNUC__) && __GNUC__>=2 +# if defined(__alpha) || defined(__alpha__) +# define INSTRUCTION_POINTER_IMPLEMENTED + __asm __volatile ( "br %0,1f\n1:" : "=r"(ret) ); +# elif defined(__i386) || defined(__i386__) +# define INSTRUCTION_POINTER_IMPLEMENTED + __asm __volatile ( "call 1f\n1: popl %0" : "=r"(ret) ); + ret = (void *)((size_t)ret&~3UL); /* align for better performance */ +# elif defined(__ia64) || defined(__ia64__) +# define INSTRUCTION_POINTER_IMPLEMENTED + __asm __volatile ( "mov %0=ip" : "=r"(ret) ); +# elif defined(__hppa) || defined(__hppa__) || defined(__pa_risc) +# define INSTRUCTION_POINTER_IMPLEMENTED + __asm __volatile ( "blr %%r0,%0\n\tnop" : "=r"(ret) ); + ret = (void *)((size_t)ret&~3UL); /* mask privilege level */ +# elif defined(__mips) || defined(__mips__) +# define INSTRUCTION_POINTER_IMPLEMENTED + void *scratch; + __asm __volatile ( "move %1,$31\n\t" /* save ra */ + "bal .+8; nop\n\t" + "move %0,$31\n\t" + "move $31,%1" /* restore ra */ + : "=r"(ret),"=r"(scratch) ); +# elif defined(__ppc__) || defined(__powerpc) || defined(__powerpc__) || \ + defined(__POWERPC__) || defined(_POWER) || defined(__PPC__) || \ + defined(__PPC64__) || defined(__powerpc64__) +# define INSTRUCTION_POINTER_IMPLEMENTED + void *scratch; + __asm __volatile ( "mfspr %1,8\n\t" /* save lr */ + "bl .+4\n\t" + "mfspr %0,8\n\t" /* mflr ret */ + "mtspr 8,%1" /* restore lr */ + : "=r"(ret),"=r"(scratch) ); +# elif defined(__sparc) || defined(__sparc__) || defined(__sparcv9) +# define INSTRUCTION_POINTER_IMPLEMENTED + void *scratch; + __asm __volatile ( "mov %%o7,%1\n\t" + "call .+8; nop\n\t" + "mov %%o7,%0\n\t" + "mov %1,%%o7" + : "=r"(ret),"=r"(scratch) ); +# elif defined(__x86_64) || defined(__x86_64__) +# define INSTRUCTION_POINTER_IMPLEMENTED + __asm __volatile ( "leaq 0(%%rip),%0" : "=r"(ret) ); + ret = (void *)((size_t)ret&~3UL); /* align for better performance */ +# endif +#elif defined(__DECC) && defined(__alpha) +# define INSTRUCTION_POINTER_IMPLEMENTED + ret = (void *)(size_t)asm("br %v0,1f\n1:"); +#elif defined(_MSC_VER) && defined(_M_IX86) +# undef INSTRUCTION_POINTER_IMPLEMENTED + void *scratch; + _asm { + call self + self: pop eax + mov scratch,eax + } + ret = (void *)((size_t)scratch&~3UL); +#endif + return ret; +} + +/* + * This function returns pointer to an instruction in the vicinity of + * its entry point, but not outside this object module. This guarantees + * that sequestered code is covered... + */ +void *FIPS_ref_point() +{ +#if defined(INSTRUCTION_POINTER_IMPLEMENTED) + return instruction_pointer(); +/* Below we essentially cover vendor compilers which do not support + * inline assembler... */ +#elif defined(_AIX) + struct { void *ip,*gp,*env; } *p = (void *)instruction_pointer; + return p->ip; +#elif defined(_HPUX_SOURCE) +# if defined(__hppa) || defined(__hppa__) + struct { void *i[4]; } *p = (void *)FIPS_ref_point; + + if (sizeof(p) == 8) /* 64-bit */ + return p->i[2]; + else if ((size_t)p & 2) + { p = (void *)((size_t)p&~3UL); + return p->i[0]; + } + else + return (void *)p; +# elif defined(__ia64) || defined(__ia64__) + struct { unsigned long long ip,gp; } *p=(void *)instruction_pointer; + return (void *)(size_t)p->ip; +# endif +#elif (defined(__VMS) || defined(VMS)) && !(defined(vax) || defined(__vax__)) + /* applies to both alpha and ia64 */ + struct { unsigned __int64 opaque,ip; } *p=(void *)instruction_pointer; + return (void *)(size_t)p->ip; +#elif defined(__VOS__) + /* applies to both pa-risc and ia32 */ + struct { void *dp,*ip,*gp; } *p = (void *)instruction_pointer; + return p->ip; +#elif defined(_WIN32) +# if defined(_WIN64) && defined(_M_IA64) + struct { void *ip,*gp; } *p = (void *)FIPS_ref_point; + return p->ip; +# else + return (void *)FIPS_ref_point; +# endif +/* + * In case you wonder why there is no #ifdef __linux. All Linux targets + * are GCC-based and therefore are covered by instruction_pointer above + * [well, some are covered by by the one below]... + */ +#elif defined(POINTER_TO_FUNCTION_IS_POINTER_TO_1ST_INSTRUCTION) + return (void *)instruction_pointer; +#else + return NULL; +#endif +} |